include module type of Core_kernel.Debug
val am : Core_kernel.Std.Source_code_position.t -> unit
am, ams, and amf output a source code position and backtrace to stderr. amf accepts a printf-style format string. ams accepts a message, value, and sexp converter for that value. Typical usage looks like:
      ...; _here_;
      Debug.amf _here_ "hello (%s, %s)" (X.to_string x) (Y.to_string y);
      Debug.ams _here_ "hello" (x, y) <:sexp_of< X.t * Y.t >>;

The am* functions output source code positions in the standard format "FILE:LINE:COL", which means that one can use a tool like emacs grep-mode on a buffer containing debug messages to step through one's code by stepping through the messages.

val ams : Core_kernel.Std.Source_code_position.t ->
string -> 'a -> ('a -> Core_kernel.Std.Sexp.t) -> unit
val amf : Core_kernel.Std.Source_code_position.t ->
('r, unit, string, unit) format4 -> 'r
val should_print_backtrace : bool ref
should_print_backtrace governs whether the am* functions print a backtrace.